JPH11216033A - Drawer member driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drawer member driving device allowing a weak person to easily draw a drawer member. SOLUTION: This drawer member driving device 1 is provided with a rack member 2 as a first drive section, a drive source 4 driving a rotary roller 3 as a second drive section, and a transfer section 5 transferring the driving force of the drive source 4 to the first and second drive sections. A drawer member 91 stored in the storage space of a casing in the position-held state by a position holding means such as a magnet is extruded to the front of the casing against the holding force by a rack member 2. The drawer member 91 extruded by the rack member 2 is slid forward by the rotary roller 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawer driving apparatus for pulling out a drawer to the front of a housing using a drive source such as a motor.

[0002]

2. Description of the Related Art A drawer member for storage provided in a cabinet such as a chest of drawers or a desk is opened and closed by manually sliding by pushing or pulling a front portion. In addition, the vegetable compartment of the refrigerator is often constituted by such a slide-movable drawer member, and in recent years, a refrigerator which employs such a slide system has appeared. Hereinafter, a configuration of a conventional drawer member will be described with reference to an example of a refrigerator.

As shown in FIGS. 14 and 15, a refrigerator 201 includes a refrigerator compartment 202, a first storage space 203 serving as a freezer compartment, a second storage space 204 serving as a vegetable compartment,
A first drawer member 206 slidably stored in the first storage space 203 and a second storage space 20
4 mainly comprises a second drawer member 207 which is slidably housed in the fourth drawer 4. The refrigerator compartment 202 and the first storage space 203 are partitioned by a partition 208. The first storage space 203 and the second storage space 204 are separated by a partition 209.

[0004] The refrigerator 201 converts cold air generated in the first storage space 203 as a freezing room into a refrigerator room 202 and a second room.
Each part is cooled while being circulated to the drawer member 207 by a fan (not shown).
And the second storage space 204 is the first storage space 20.
Each of the evaporators is connected to an evaporator (not shown) disposed in the vicinity of the evaporator 3 by a circulation passage.

A first storage space 203 as a freezing room
Has an opening 211 on the front surface, a partition 208, a partition 209, a closed space on the rear surface and both side surfaces, and the first drawer member 206 is accommodated therein. This first drawer member 206
Front surface 206a, bottom surface 206b, both side surfaces 206c, 206
c and a rear surface 206d, and is formed in a box shape having an open upper surface portion.

The front surface 206a is provided on the bottom surface 206b side so that the opening 211 is completely sealed when the first drawer member 206 is stored in the first storage space 203.
It is formed so as to protrude on both side surfaces 206c, 206c side and upper surface side. Further, a suction magnet 221 for firmly holding the first drawer member 206 in the first storage space 203 is provided in a portion of the front surface 206a that comes into contact with the opening 211. That is, the attracting magnet 221 is attached to the front surface 206 of the first drawer member 206.
a is to be adsorbed to the opening 211 formed of a metal plate. Further, a pull handle 206e for manually pulling the first drawer member 206 to the near side is provided below the front surface 206a. The first drawer member 206 is firmly held in the first storage space 203, but slides with a slight force when the attraction between the attraction magnet 221 on the front surface 206a and the opening 211 is separated. I have.

[0007] The first drawer member 2 thus configured
When 06 is pulled to the front side to protrude forward from the first storage space 203, frozen foods and the like can be taken in and out from the opened portion of the upper surface. Note that the second drawer member 207 is also the first drawer member 20.
6 has the same configuration as that of FIG.

[0008]

However, in the case of the drawer member used for the refrigerator 201 as described above, a large number of heavy articles are often packed inside the drawer member. For this reason, the opening / closing operation of the drawer member becomes difficult.
Furthermore, in the case of a refrigerator, the drawer members 206 and 20 are used to hold the drawer member firmly in a closed state.
7 has a structure in which a suction magnet 221 is provided on the front surface thereof and is suctioned to the opening 211, so that a large amount of force is required for the first operation at the time of pulling out. For this reason, the operation is more difficult for elderly people, women, and the like, particularly those with weak powers. In addition to the refrigerator, there is a common problem in a housing having a large storage space and a drawer member of a type in which the drawer member is attracted by a magnet or the like.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drawer member driving device capable of easily opening a drawer member even by a person with weak power in view of the above-mentioned problems.

[0010]

In order to achieve the above object, a drawer member driving device according to the first aspect of the present invention includes a drawer member for storage housed in a state of being held in a storage space of a housing. A drawer member driving device for pulling the drawer member forward from the body, wherein the first drive portion pushes the drawer member toward the front of the housing from the storage space against the position holding force, and the drawer member is slid toward the front of the housing. A second driving unit to be driven, one driving source for supplying a driving force to the first driving unit and the second driving unit, and a driving force of the driving source transmitted to both the first driving unit and the second driving unit. 1 drive unit and the second drive unit
A transmission unit for driving the driving unit.

According to a second aspect of the present invention, in the drawer member driving device of the first aspect, the driving force of the first driving unit and the driving force of the second driving unit are set to different amounts. I have.

Further, the invention according to claim 3 is the invention according to claim 1.
Or the drawer member driving device according to 2, wherein the first drive unit advances and retreats in the same direction as the direction in which the drawer member slides, and advances while contacting a predetermined portion of the drawer member. In addition to being constituted by an extruded rack member, the second drive unit
It is constituted by a rotating roller that feeds out the drawer member by rotating while sliding on a part of the drawer member.

According to a fourth aspect of the present invention, in the drawer member driving device of the third aspect, when the rack member advances forward, the position holding portion for holding the position of the rack member at the front position. Is provided.

[0014] The invention described in claim 5 is based on claim 1,
In the drawer member driving device according to 2, 3, or 4,
After the drawer member has moved to the end, it has a control unit that turns off the drive source.

[0015] The invention according to claim 6 is based on claim 1,
In the pull-out member driving device described in 2, 3, 4, or 5, provided between the transmitting portion and the first driving portion so as to always engage with the transmitting portion and intermittently engage with the first driving portion. In addition to providing the intermittent gear, a swing gear is provided between the transmission unit and the second drive unit, which is always engaged with the transmission unit and is swingably engaged with the second drive unit.

According to a seventh aspect of the present invention, in the drawer member driving device according to the first, second, third, fourth, or fifth aspect, the driving source is constituted by a bidirectionally rotatable motor,
By rotating the motor to one side, the first drive unit is advanced to push the drawer member forward of the housing, and by rotating the motor in the reverse direction, the first drive unit is retracted to the original position. The drawer member is slid to the front of the housing by rotating the portion.

According to an eighth aspect of the present invention, in the drawer member driving device according to the seventh aspect, when the motor is rotated to one side, the driving force of the motor is not transmitted from the transmission portion to the second driving portion. A first blocking portion and a second blocking portion for preventing the driving force of the motor from being transmitted from the transmitting portion to the first driving portion when the motor is rotated in the reverse direction are provided.

Further, the invention according to claim 9 is the same as claim 8
In the drawer member driving device described above, the transmitting unit transmits the driving force of the driving source to the first driving unit, the second transmitting unit transmits the driving force to the second driving unit, and the driving force from the driving source. And relay means for transmitting the first transmission means to both the first transmission means and the second transmission means, wherein the first blocking part is for stopping the second transmission means, and the second blocking part is the first transmission means. Is to be stopped.

The invention according to claim 10 is the invention according to claim 9.
In the drawer member driving device described above, the relay unit rotates by engaging with one of the gear trains provided between the drive source and the transmission unit, and transmits the rotational force to the first transmission unit. And a planetary gear that revolves around one of the gear trains together with the second transmission means when the first transmission means is stopped.

In the drawer member driving device of the present invention, the drawer member is pushed forward of the housing by the first driving means against the holding force of the position holding means due to the attractive force of the magnet or the like. Then, the pushed-out drawer member is slid by the second drive unit toward the front of the housing. By transmitting the driving force of the driving source to the first driving unit and the second driving unit via the transmission unit in this way, even a drawer having position holding means can be easily pulled out to the front of the housing. It becomes possible.

Further, if the driving force of the first driving unit is configured to be larger than the driving force of the second driving unit, it is possible to easily pull out even if a strong force is required at the beginning of drawing. After the drawer member is separated from the holding force of the position holding means, it is often sufficient to slide the drawer member with a small force. A configuration in which the driving force of the second driving unit is smaller than the driving force of the first driving unit is preferable in such a case. That is, even if the drawer member is held in position by the attraction force of a magnet or the like, it is reliably pushed forward from the storage space, and the drive force during the slide movement is pulled forward in a smooth state without becoming too strong. .

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A drawer driving device according to a first embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the drawer member driving device is described as being attached to the refrigerator, but the present invention is not particularly limited to the drawer member driving device attached to the refrigerator.

The drawer member driving device 1 includes a first drawer member 9 provided in a refrigerator 81 as a housing shown in FIG.
1 is a device for automatically pulling out the refrigerator 1 to the front of the main body of the refrigerator 81. In addition, the first provided in the refrigerator 81
When the drawer member 91 is stored in the first storage space 83 provided in the main body of the refrigerator 81, the first storage space 83 is held by the holding force of the position holding means including the attraction magnet 90a provided in the front part 91a. It is designed to be held in position.

As shown in FIG. 1, the drawer member drive device 1 includes a rack member 2 as a first drive unit for pushing the first drawer member 91 forward of the refrigerator 81 against the position holding force of the attraction magnet 90a. A rotating roller 3 as a second driving unit for sliding the first drawer member 91 pushed out by the rack member 2 to the front of the refrigerator 81; a DC motor 4 as a driving source for these two driving units;
The driving force of the C motor 4 is applied to the rack member 2 and the rotating roller 3.
And a transmission gear 5 as a transmission unit for transmitting the rack member 2 and the rotating roller 3 to each other, and a casing 6 accommodating the transmission gear 5 therein.

The DC motor 4 is installed and fixed to a motor fixing portion 61 provided inside the casing 6 so as to surround the DC motor 4. The DC motor 4 is placed in the casing 6 so as to be slightly inclined in order to keep the dimension H in the height direction of the casing 6 short. One ends of lead wires 4a and 4b are connected to the DC motor 4, respectively. These lead wires 4a and 4b pass through the notch 62 provided in the casing 6 and have the other end exposed to the outside. The other ends of the lead wires 4a and 4b led out of the casing 6 are connected to control units 88 (see FIG. 9) for controlling the DC motor 4, respectively.

The driving force of the DC motor 4 installed as described above is transmitted to the transmission gear 5 through the worm 7 and the reduction gear 8 at reduced speed. And DC
The driving force of the motor 4 is transmitted from the transmission gear 5 via the intermittent gear 9 to the rack member 2 serving as the first drive unit, and to the rotating roller 3 serving as the second drive unit via the swing gear 10. Is transmitted.

The rotating shaft 4c of the DC motor 4 projects from an insertion hole 61a provided in the motor fixing portion 61 into the internal space of the casing 6. The worm portion 7 is integrally fixed to the protruding portion of the rotating shaft 4c. The worm portion 7 includes a worm shaft 7a and a worm gear 7b integrally formed on the outer periphery of the worm shaft 7a. At one end of the worm shaft 7a, a fitting portion 7c for fitting and fixing the rotating shaft 4c of the DC motor 4 is provided. The other end of the worm shaft 7a is rotatably supported by a worm support 63 formed on the casing 6. The worm gear 7b is engaged with the receiving gear 8a of the reduction gear body 8. With such a configuration, the worm portion 7 transmits the driving force of the DC motor 4 to the reduction gear body 8 while reducing the speed.

The reduction gear body 8 includes a worm gear 7b.
And a receiving gear 5a of the transmission gear 5
, A receiving gear 8a and a feed gear 8
b and a clutch spring 8c for overload countermeasures. The receiving gear 8a is arranged so as to be coaxial with the feed gear 8b. One end of the receiving gear 8 a is rotatably supported by one case half 6 a of the casing 6, and the other end is rotatably supported by a bearing recess 69 provided on the other case half 6 b of the casing 6. Between the rotating shaft 68 and the feed gear 8b, the clutch spring 8c urges the feed gear 8b.
The feed gear 8b is provided integrally with the rotating shaft 68.

In the normal operation, the receiving gear 8a of the reduction gear body 8 having the above-described structure is formed by the clutch spring 8c.
Is pressed against the feed gear 8b side, and the receiving gear 8a and the feed gear 8b rotate integrally. When the receiving gear 8a receives the rotation of the worm 7, the rotation is transmitted from the feed gear 8b to the transmission gear 5 while being reduced.

The receiving gear 8a and the feed gear 8b are
As described above, they are integrated by the biasing force of the clutch spring 8c. Therefore, when a rotational force equal to or less than a predetermined torque is transmitted, the receiving gear 8a and the feed gear 8b rotate integrally. However, when the transmitted torque is equal to or greater than a predetermined torque, the clutch spring 8c slips and the torque is not transmitted, and the receiving gear 8a and the feed gear 8b do not rotate integrally. .

With this configuration, the first drawer member 91
Is manually driven in the closing direction, and when the rack member 2 serving as the first driving unit moves in the direction indicated by the arrow B in FIG. 1, the movement of the rack member 2 causes the intermittent gear 9 to rotate, and the force is transmitted by the feed gear 8b. Even if the feed gear 8b rotates in the reverse direction, the torque is not transmitted to the receiving gear 8a if the rotational force is equal to or greater than the predetermined torque. That is, even if the first drawer member 91 is closed with a strong force, the feed gear 8b is prevented from running idle, and the tooth tips of the gears are prevented from being damaged.

The transmission gear 5 is for transmitting the driving force of the DC motor 4 to both the rack member 2 as a first driving unit and the rotating roller 3 as a second driving unit. As shown in FIGS. 1, 2 and 3, the transmission gear 5 has a large-diameter tooth portion 5 a that engages with the feed gear 8 b of the reduction gear body 8 and also engages with the swing gear 10, and the intermittent gear 9. And a small-diameter tooth portion 5b to be engaged. Large diameter tooth 5
a and the small-diameter tooth portion 5b are integrally formed and rotatably supported by a fixed shaft 65 erected on the casing 6. Then, the large-diameter tooth portion 5a is
When the feed gear 8b is rotated, the large-diameter tooth portion 5a and the small-diameter tooth portion 5b rotate integrally.

The small-diameter tooth portion 5b is always engaged with the receiving tooth portion 9a of the intermittent gear 9 which engages with the rack member 2 as the first driving portion. Therefore, the D transmitted to the transmission gear 5
The driving force of the C motor 4 is transmitted to the always-time missing gear 9. On the other hand, the large-diameter tooth portion 5a is always engaged with the gear portion 10a of the oscillating gear 10 which is provided so as to be capable of engaging and disengaging with the rotating roller 3 as the second driving portion. For this reason, the driving force of the DC motor 4 transmitted to the transmission gear 5 is transmitted to the intermittent gear 9 and the
0 is also transmitted.

The intermittent gear 9 is a transmission gear 5 as a transmission unit.
And a rack member 2 as a first drive unit. The drive force of the DC motor 4 is transmitted to the rack member 2 as a first drive unit.

As shown in FIG. 4, the intermittent gear 9 engages with the receiving teeth 9a formed with teeth for engaging with the small-diameter teeth 5b of the transmission gear 5, and the rack teeth 21a of the rack member 2. The teeth are formed from intermittent feed teeth 9b partially formed in an arc shape. The receiving tooth portion 9a is formed on the entire circumference with a width of about half in the axial direction of the intermittent gear 9. Also,
The intermittent feed tooth portion 9b is formed by an extension of a part of the teeth of the receiving tooth portion 9a. Thereby, the intermittent gear 9
Means that the teeth are formed in the entire width in the axial direction in the range where the intermittent feed teeth portion 9b is formed. The intermittent gear 9 thus formed is rotatably supported on a fixed shaft 66 erected on the casing 6. And the intermittent gear 9
When the receiving gear 9a receives the rotation of the transmission gear 5, this rotation is transmitted from the intermittent feed gear 9b to the rack gear 21a of the rack member 2.

The teeth of the intermittent feed tooth portion 9b are formed not on the entire circumference but on a part of the intermittent gear 9 as described above. Therefore, when the intermittent gear 9 rotates, the rotation is intermittently transmitted from the intermittent feed tooth portion 9b to the rack tooth portion 21a of the rack member 2 only in a partial range. After the rack member 2 is sent in the direction of arrow A in FIG. 1 by the rotation of the intermittent gear 9, the rack member 2
It stops at the position where the engagement between 1a and the intermittent feed dog portion 9b is released. After the engagement with the rack member 2 is released, the intermittent gear 9 cannot engage with the rack member 2 and idles even if the driving force of the DC motor 4 is transmitted.

The rack member 2 serving as the first drive unit includes a guide wall 7 provided on one case half 6 a of the casing 6.
0a and a guide wall 70 provided on the other case half 6b
The moving body 21 includes a push rod 22 having one end fixed to the movable body 21 and sliding with the movable body 21.

As shown in FIGS. 1 and 2, the moving body 21 includes a rack tooth 21a which engages with the intermittent feed tooth 9b,
Guide groove 21 into which guide wall 70a is slidably fitted inside.
b, a guide groove 21d into which the guide wall 70b is slidably fitted inside, and a fitting portion 21c into which an elastic convex portion 71 provided on the inner wall of the casing 6 is fitted. When the intermittent gear 9 rotates, the moving body 21 changes its rotation from the intermittent feed teeth 9b to the rack teeth 21a.
And moves in the direction of arrow A in FIG. 1 along the guide walls 70a and 70b.

When the movable body 21 comes to a position where the movement in the direction of arrow A is completed, the fitting portion 21c is moved to the elastic convex portion 71.
It is designed to fit in. Thus, the rack member 2 is held at the front position by the casing 6. This is to prevent the operation of the rack member 2 from becoming uncertain due to, for example, the position of the rack member 2 moving due to the vibration of the refrigerator 81 or the like. Here, the elastic projection 71 includes a spring 71a and a spring 71a.
And a support shaft 71c that penetrates the elongated hole of the operating portion 71b and is supported by the two case halves 6a and 6b. However, the elastic convex portion 71 may have another configuration, for example, a one-piece convex piece using a material having elasticity.

As described above, one end of the push rod 22 is fixed to the moving body 21. Therefore, when the moving body 21 moves, the push bar 22 also moves integrally with the moving body 21. The push rod 22 is formed of a rod-shaped member extending in the moving direction of the moving body 21, and is inserted through an insertion hole 72 provided in the casing 6.
The other end protrudes outside the casing 6. The other end of the push rod 22 is connected to the first storage space 8 of the refrigerator 81.
Front part 91a of first drawer member 91 housed in 3
It is arranged so that it may contact inside. This push rod 2
When the moving body 21 is moved in the direction of arrow A in FIG. 1 by the rotation of the intermittent gear 9, the other end of the moving body 21 further projects outward. As a result, the first drawer member 9 held in position in the first storage space 83 of the refrigerator 81 by the attraction force of the attraction magnet 90a provided on the front part 91a.
1 is pushed forward by the push rod 22 against its holding force. Thereby, the first drawer member 91 is released from the position holding state in the first storage space 83.

As described above, in the rack member 2 as the first drive unit, the push rod 22 is pushed forward of the refrigerator 81 by the rotational driving force of the DC motor 4, and the first drawer member 91 holds the position of the position holding means. The operation of releasing from is performed. The subsequent operation of the first drawer member 91, that is, the operation of sliding the first drawer member 91 forward of the refrigerator 81, is performed by the rotating roller 3 as a second drive unit.

The drawer member driving device 1 is a device for driving the first drawer member 91 only to the front of the refrigerator 81. Therefore, the first drawer member 91
Is driven forward by this drawer member driving device 1,
After the food or the like is taken in or out, a person manually returns the drawer member 91 into the first storage space 83. When the first drawer member 91 is manually returned to the first storage space 83 side, the push rod 22
The drawer member 91 moves in the direction of arrow B in FIG. At this time, the moving body 21 passes through the rotational trajectory position of the intermittent feed tooth portion 9b of the intermittent gear 9 without engaging with the teeth of the intermittent feed tooth portion 9b. The tooth is returned to a position where it can be engaged with the first tooth of the intermittent feed dog portion 9b, that is, a so-called original position.

In the drawer driving apparatus 1, initially, the driving force of the DC motor 4 is transmitted to both the rack member 2 as the first driving section and the rotating roller 3 as the second driving section. However, after the intermittent gear 9 rotates while engaging with the moving body 21 and moves the moving body 21 in the direction of arrow A in FIG. 1, the engagement between the intermittent gear 9 and the moving body 21 is released. The driving force of the DC motor 4 at this time is transmitted only from the transmission gear 5 to the rotating roller 3 via the swing gear 10. Then, after the first drawer member 91 is completely moved to the front of the refrigerator 81, the DC motor 4 is controlled to stop. Therefore, the intermittent gear 9
After the moving body 21 is moved, while the DC motor 4 is driving the rotating roller 3, the transmission gear 5 is rotated and idles. Therefore, when the DC motor 4 stops, the intermittent gear 9 has a possibility of stopping at an arbitrary rotation position.

As a result, the intermittent gear 9 stops when the teeth of the intermittent feed teeth 9b are in the path of the return stroke of the rack teeth 21a of the moving body 21, that is, in a position where the teeth can engage with the rack teeth 21a. There is a possibility of doing it. Intermittent feed dog 9
Assuming that b stops at a position where it engages with the rack teeth 21a, the rack teeth 21a of the moving body 21 and the intermittent feed teeth 9b of the intermittent gear 9 when closing the first drawer member 91 manually. Will be engaged. Then, moving body 2
The force by which the gear 1 is manually pushed is transmitted to the gear train, and there is a risk of damaging the tip of each gear.

However, in the drawer driving apparatus 1 according to the first embodiment, the control for preventing the rack teeth 21a and the intermittent feed teeth 9b from engaging with each other in the return stroke of the moving body 21 is as follows. Done in First, in the drawer member driving device 1, when the forward movement of the first drawer member 91 is completed and the DC motor 4 is stopped, immediately after that, the DC motor 4 is once rotated reversely. This DC motor 4
Is to disengage the engagement between the rotating roller 3 as the second drive unit and the oscillating gear 10 in advance in preparation for the returning operation of the first drawer member 91 manually.

As described above, the rotating roller 3 and the swing gear 10
When the DC motor 4 is rotated reversely until the DC motor 4 is released, the intermittent gear 9 also rotates reversely with the reverse rotation of the DC motor 4. In the drawer member driving device 1 of the first embodiment, the reverse rotation position of the intermittent gear 9 is detected, and when each tooth of the intermittent feed tooth portion 9b comes to a position where it does not engage with the rack tooth portion 21a. Then, the DC motor 4 is stopped to prevent the intermittent gear 9 from engaging with the rack teeth 21a.

That is, a position detecting magnet 9c for detecting the rotational position of the intermittent gear 9 is embedded at a part of the position of the intermittent gear 9 facing the case half 6b of the casing 6. On the other hand, the case half 6b of the casing 6
, A Hall IC 41 that detects the magnetic force of the position detecting magnet 9c and detects the rotational position of the intermittent gear 9 is installed and fixed. This Hall IC 41 has a circuit pattern 41
a, 41b and leads 42a, 42b to a control unit 88 for controlling and driving the DC motor 4. Thereby, the position information of the intermittent gear 9 detected by the Hall IC 41 is transmitted to the control unit 88. The Hall IC 41 is connected to a power supply Vcc (not shown) via a circuit pattern 41c and a lead wire 42c.

The control unit 88 determines that the intermittent feed teeth 9b are based on the position information from the Hall IC 41.
When it comes to a position where it does not engage with 1a, the DC motor 4 is stopped. As a result, the intermittent gear 9 is
Stop so that each tooth of b does not engage with the rack teeth 21a. Although the Hall IC 41 is provided as a detecting unit for detecting the rotational position of the intermittent gear 9, a position detecting unit having another appropriate configuration such as a device using a photoelectric element may be used instead of the Hall IC 41. Good.

As described above, in the pull-out member driving device 1 of the first embodiment, the rack member 2 is returned to the original position without engaging with the intermittent gear 9. That is, the first drawer member 91 is manually
When returning to the first storage space 83, the force is not transmitted to the DC motor 4 direction.

However, if the rotation position of the intermittent gear 9 cannot be detected due to a failure of the Hall IC 41 or other causes, the intermittent feed dog 9b stops at the position where it engages with the rack tooth 21a. The moving body 21 is engaged with the intermittent gear 9 when returning in the direction indicated by the arrow B. When the intermittent gear 9 is rotated by the movement of the moving body 21 in this manner, the rotation is further transmitted to the reduction gear body 8 via the transmission gear 5. However, the reduction gear body 8
Since the clutch spring 8c has the clutch spring 8c as described above, the clutch spring 8c slips and does not rotate integrally when the rotational force is equal to or more than a predetermined torque. As a result, even if the first drawer member 91 is manually returned to the first storage space 83 with a strong force, the force is not transmitted to the DC motor 4 side, the feed gear 8b idles, and the teeth of each gear Damage to the tip and the like is prevented.

On the other hand, the first drawer member 91 is manually moved to the first
When returning to the storage space 83, if the rack teeth 21a are not completely returned and are stopped in a state of being slightly shifted in the rotation trajectory of the intermittent feed teeth 9b, the intermittent gear 9 is driven to rotate. Then, there is a danger that the tip of the tooth of the rack tooth 21a collides with the tip of the intermittent feed dog 9b and mechanical lock occurs. In the state where the intermittent feed tooth portion 9b is stopped during the return stroke of the rack tooth portion 21a, the moving body 2
Also when 1 is returned to the original position direction, there is a risk that the tip of the tooth of the rack tooth 21a may collide with the tip of the intermittent feed tooth 9b and mechanical lock may occur. However, in this embodiment, the configuration is such that the danger of the mechanical lock is reduced. That is, as shown in FIG. 5, an inclined surface 21d is formed at the tip of each tooth of the rack tooth 21a, and the tip of the tooth of the rack tooth 21a and the tip of the tooth of the intermittent feed tooth 9b are formed. When it hits, the intermittent feed tooth portion 9b slips and falls into the valley with the next tooth. As a result, the moving body 21 smoothly engages with the intermittent gear 9.

On the other hand, the swing gear 10 is provided between the transmission gear 5 as a transmission unit and the rotating roller 3 as a second drive unit. Then, the driving force of the DC motor 4 is
This is for transmitting to the rotating roller 3 as a second driving unit.

The swing gear 10 is a large-diameter tooth portion 5 of the transmission gear 5.
a, and a gear portion 10a which is always engaged with the gear portion 10a.
and a shaft portion 10b extending in the axial direction from a substantially central portion of the shaft portion a. An insertion hole 10c is formed at the center of rotation of the swing gear 10 so as to be inserted from the end face of the shaft 10b to the end face of the gear 10a. Inside the insertion hole 10c, a closed elongated hole 6d provided in one case half 6a and the other direction case half 6
A swing shaft 67 movably supported at both ends is inserted into the closed elongated hole 6e provided at b. With this configuration, the swing gear 10 can freely move in the circumferential direction around the fixed shaft 65 within a range in which the swing shaft 67 can move in the closed oblong holes 6d and 6e. Thus, the swing gear 10 can be engaged with and disengaged from the pinion portion 3a of the rotating roller 3.

Two rocking disks 11a and 11b are provided above and below the transmission gear 5 and the rocking gear 10 in the axial direction so as to overlap each other at positions separated in the axial direction. These oscillating disks 11a and 11b have a slight frictional engagement with the transmission gear 5 and the oscillating gear 10, respectively, but are basically in a free state.
And the swing gear 10.
The oscillating disks 11a and 11b have a fixed shaft 65 serving as a rotation center of the transmission gear 5 as a fulcrum, and the oscillating shaft 67 inserted through the oscillating gear 10 swings. That is, the side that becomes the fulcrum of the oscillating disks 11a and 11b is
The two case halves 6a, 6b are rotatably inserted into the fixed shaft 65 and are substantially at the center on the side that swings.
Insertion holes 11c, 1 through which a swinging shaft 67 that can move inside
1d is formed.

The oscillating disk 1 provided as described above
1 a and 11 b swing according to the rotation direction of the transmission gear 5. When the oscillating disks 11a and 11b oscillate in this way, the oscillating gear 10 moves in the direction in which the oscillating disks 11a and 11b have moved due to the frictional force between the oscillating disks 11a and 11b. That is, when the transmission gear 5 rotates in the direction of arrow C in FIG.
1b moves to the position shown by the solid line in FIG. In response to this operation, the swing gear 10 also moves to the position shown by the solid line. As a result, the oscillating gear 10
With the pinion portion 3a.

Conversely, when the transmission gear 5 rotates in the direction indicated by the arrow D in FIG. 1, the oscillating disks 11a and 11b move to the positions indicated by the dotted lines in FIG. In response to this operation, the swing gear 10 also moves to the position shown by the dotted line. Thus, the swing gear 10 is disengaged from the pinion portion 3a of the rotating roller 3. When the swing gear 10 is disengaged from the rotary roller 3, the swing gear 10 is held at a position where it hangs down in the vertical direction due to its own weight, that is, a position shown by a dotted line in FIG.

With the above-described configuration, the first drawer member 9
In the case of a normal operation of pushing out 1, the oscillating gear 10
Engage with the rotating roller 3. Immediately after the operation of pushing out the first drawer member 91 is completed, the transmission gear 5 is reversely rotated by reversely rotating the DC motor 4 as described above, so that the oscillating gear 10 does not engage with the rotary roller 3. Move to position. Thus, even if the first drawer member 91 is manually returned thereafter, the force is not transmitted from the rotating roller 3 to the swing gear 10 and is not input into the mechanical mechanism.

However, for some reason, the control unit 88
Does not function normally, and the reverse rotation of the DC motor 4 is not performed, the oscillating gear 10 remains in the state of being engaged with the rotating roller 3. In such a case,
In the drawer member driving device 1 of the embodiment, when the first drawer member 91 is manually pushed back in the closing direction, the swing gear 10 and the rotating roller 3
Is disengaged.

That is, when the first drawer member 91 is manually moved in the direction indicated by the arrow B in FIG. 1, the rotating roller 3 rotates in the direction indicated by the arrow E, and with this rotation, the oscillating gear 10 rotates in the direction indicated by the arrow F. Rotate in the direction. Then, the swing gear 10
The transmission gear 5 engaged with the rotation in the arrow D direction.
When the transmission gear 5 rotates in the direction indicated by the arrow D, the swing disks 11a and 11b move from the solid line position to the dotted line position. With the swing of the swing disks 11a and 11b,
The swing gear 10 also moves from the solid line position to the dotted line position, and the engagement between the swing gear 10 and the pinion portion 3a of the rotating roller 3 is released. As described above, the drawer member driving device 1 according to the first embodiment manually moves the first drawer member 91 by the arrow B.
When moving in the direction, the rotation of the rotating roller 3 generated at that time is not transmitted to the gear train mechanism. Therefore, problems such as damage to the teeth of each gear do not occur.

With this configuration, when the DC motor 4 is not energized, the first pull-out member 91 can be pulled out quite smoothly even when it is manually pulled out. That is, when the first drawer member 91 is not energized,
, The roller 3 rotates in the direction of arrow E '. This rotation generates a force that disengages the swing gear 10 from the rotating roller 3.
Therefore, the swing gear 10 and the rotating roller 3 are disengaged from each other, and the pull-out operation can be performed quite smoothly without the resistance of the mechanical mechanism.

As shown in FIG. 1, FIG. 3, and FIG. 6, the rotary roller 3 as the second drive unit includes a pinion 3a engaged with the gear 10a of the swing gear 10, and one of the pinions 3a. It comprises a cylindrical shaft portion 3b formed so as to extend from the center of rotation of the surface, and a rubber toothed roller portion 3c fixed to the outer periphery of the shaft portion 3b. The rotating roller 3 is rotatably supported by the fixed shaft 64 by inserting a cylindrical shaft portion 3b through a fixed shaft 64 having both ends fitted and fixed to the casing 6. With this configuration, when the engaged swing gear 10 rotates, the rotating roller 3 rotates by receiving the rotation of the swing gear 10.

The toothed roller portion 3 c is arranged so that a part of the outer periphery of the toothed roller portion 3 c projects out of the casing 6 from a groove 73 provided in the casing 6. A plurality of feed teeth 3d that engage with receiving teeth (not shown) formed on the upper surface of the side surface portion 91c of the first pull-out member 91 are provided on the outer periphery of the toothed roller portion 3c.
For this reason, when the rotating roller 3 rotates, the first drawer member 91 is fed by the feed dog 3d, and is slid and moved forward of the refrigerator 81 main body.

In the first embodiment, the feeder 3d feeds the first drawer member 91 forward of the main body of the refrigerator 81. For example, the feeder 3d is not provided, and the rotary roller 3d is not provided. May be a rubber roller whose outer peripheral surface is made of rubber, or the feed dog 3d may be made of metal or resin instead of rubber.

When a circular rubber roller is used, the rotating roller 3 is arranged so that its outer peripheral surface is pressed against the first drawer member 91, and the first drawer member 91 is fed by frictional force. In any of the methods, the driving force of the rotating roller 3 serving as the second driving unit, that is, the driving force for sending the first drawer member 91 forward by the rotation of the rotating roller 3 is a rack member serving as the first driving unit. It is preferable that the driving force is weaker than that of the driving force of the second driving force.

That is, in the pull-out member driving device 1 of the present embodiment, the first pull-out member 91, which is held in the first storage space 83 by the position holding means constituted by the attraction magnet 90a, is moved with a large driving force. After pushing forward with the rack member 2 to release the position holding, the rotating roller 3
To slide slowly. With this configuration, when a person manually pulls the drawer forward, the drive is not suddenly driven by a strong force by the motor, so that the safe drawer member driving device 1 can be provided.

In the vicinity of the rotating roller 3, there is provided a Hall IC 42 for detecting that the first drawer member 91 has been completely pulled out, ie, that the first drawer member 91 has been moved to the end. ing. The Hall IC 42 is opposed to the upper surface of the side surface portion 91 c of the first drawer member 91 by the window 74 provided in the casing 6. On the other hand, the side surface portion 91c of the first drawer member 91
A magnet (not shown) for sending a signal to the Hall IC 42 is provided at a terminal portion on the upper surface of the IC. The Hall IC 42 is connected to a control unit 88 that controls and drives the DC motor 4 via circuit patterns 41d and 41f and lead wires 42b and 42d.

The Hall IC 42 thus configured is
When detecting that the first drawer member 91 has moved to the end, the detection signal is sent to the control unit 88. Then, the control unit 88 stops the DC motor 4 in accordance with the signal sent from the Hall IC 42. This Hall I
C42 can be used not only for the end detection but also for other detections, for example, the detection of the amount of pull-out of the pull-out member.

The Hall IC 42 has a circuit pattern 4
1e and a power supply Vcc (not shown) via the lead wire 42b. That is, the power supply Vcc (not shown) and the lead wire 42c connecting the power supply Vcc to the Hall IC 42 and the lead wire 42b connecting the ground (not shown) of the control unit 88 and the Hall IC 42 are:
It is shared with the one for the Hall IC 41 described above.

Further, this drawer member driving device 1
As described above, this is a device that drives the first drawer member 91 only to the front of the refrigerator 81 main body. Therefore,
After the drawer member driving device 1 completely drives the first drawer member 91 forward by the rotating roller 3,
A person manually returns the first drawer member 91 into the first storage space 83. Then, when the first drawer member 91 is manually returned to the first storage space 83 side, the first drawer member 91 moves while rotating the rotating roller 3 and returns to the first storage space 83.

As described above, after the first drawer member 91 is moved forward and the DC motor 4 is rotated in the reverse direction, the oscillating gear 10 becomes the oscillating disk 11a,
It moves in a direction away from the rotating roller 3 together with 11b. Therefore, when the first drawer member 91 is manually returned in the direction indicated by the arrow B, the rotating roller 3 that has been disengaged from the swing gear 10 idles. With this configuration, a person can easily return the first drawer member 91 to the first storage space 83 manually.

The casing 6 is composed of two case halves 6a and 6b. As described above, the rack member 2 as the first driving unit, the rotating roller 3 as the second driving unit, and the driving source as described above. It has a box shape that houses the DC motor 4 and the like inside. Inside the casing 6, a DC motor 4 is supplied to the rack member 2 and the rotating roller 3.
Fixed shafts 65 and 66, which rotatably support a plurality of gears for transmitting the driving force, and a fixed shaft 64, which rotatably supports the rotating roller 3, are provided upright. In addition,
The fixed shafts 65 and 66 may be rotating shafts that rotate integrally with the gear portion. Further, one of the case halves 6a is provided with a closed elongated hole 6d that movably supports one end of the swing shaft 67. Further, the other case half 6b is provided with a closed elongated hole 6e that movably supports the other end of the swing shaft 67.

The drawer member driving device 1 of the first embodiment configured as described above is mounted on the refrigerator 81 to drive the first drawer member 91 of the refrigerator 81. The drawer member driving device 1 is configured such that screws (not shown) are inserted into fixing screw holes 1b, 1b provided in fixing portions 1a, 1a provided on the outside of the casing 6, so that the partition 85 of the refrigerator 81 can be inserted. It is designed to be detachably screwed and fixed.

As shown in FIG. 7 and FIG.
Includes a refrigerator compartment 82 for storing food products such as beverage products which need to be refrigerated, a first storage space 83 for a first drawer member 91 for storing frozen foods and the like, and foods such as vegetables and the like. For the second drawer member 93 for storing the
The housing has three chambers of the storage space 84. A partition 85 is provided between the refrigerator compartment 82 and the first storage space 83, and a partition 86 is provided between the first storage space 83 and the second storage space 84.

In the refrigerator 81, only the first drawer member 91 provided in the upper stage of the two drawer members 91 and 93 is driven by the drawer member driving device 1 described above. Drawer members 91, 9
It is also possible to drive only the second drawer member 93 provided at 3 or the lower stage by the drawer member driving device 1. The refrigerator 81 has two drawer members 91 and 9.
3, but the number of drawers may be one or three or more. When three or more drawer members are provided, the same number of drawer member driving devices 1 as the number of drawer members may be provided to drive all the drawer members, or some of the drawer members may be driven. The drawer member driving device 1 may be arranged so as to drive only the drawer member.

The first storage space 83 as a freezing room is
A partition 8 which is disposed substantially at the center of the refrigerator 81 and serves as an upper surface.
5. Partition 86 serving as bottom surface, back surface 83b, both side surfaces 83
c, 83c, and is formed in a space in which the front portion is an opening 90. This first storage space 83
The first drawer member 91 stored in the front part 91a
, A back surface portion 91b, both side surface portions 91c, 91c, and a bottom surface portion 91d, and is formed in a box shape having an open upper surface portion.

The front portion 91a is provided on the bottom surface 91d side and on both side surfaces 91c, 91c so that the opening 90 is completely sealed when the first drawer member 91 is stored in the first storage space 83. And projecting toward the upper surface side. Further, at a portion of the front surface 91a which comes into contact with the opening 90, an attraction magnet 90a for firmly holding the first drawer member 91 in the first storage space 83 is provided. With this configuration, when the first drawer member 91 is completely stored in the first storage space 83, the position is held in the first storage space 83. As a result, the first storage space 83 is completely sealed. That is, the attracting magnet 90
“a” is a position holding unit that holds the position of the first drawer member 91 in the first storage space 83. At the lower end of the front portion 91a, a notch-like pulling handle 91g is provided to allow a person to hang his / her finger and pull it forward when opening the first drawer member 91.

The first drawer member 91 is adapted to take frozen food or the like in and out of an open portion of the upper surface portion in a state of being pulled out from the first storage space 83. Note that a temperature sensor 91e for detecting the room temperature in the freezer compartment is provided in the upper partition portion of the first storage space 83.

The first drawer member 91 constructed as described above is operated by a person who puts his / her finger on the pulling handle 91g of the front surface portion 91a, and the DC motor 4 of the drawer member driving device 1 is activated. 4 is an automatic drawer member that is drawn forward by the driving force of No. 4. In addition, the drawer member driving device 1 includes the drawer member 91.
Is mounted on the partition 85 located above the one side surface portion 91 c and near the opening 90.

Further, a touch sensor 87 for detecting that a person is about to pull out the first drawer member 91 is provided on the pulling handle 91g of the first drawer member 91. The touch sensor 87 is connected to the control unit 88 as shown in FIG. The DC motor 4 and the two Hall ICs 41 and 42 of the drawer driving device 1 are also connected to the control unit 88 to control the DC motor 4, to input a signal from the touch sensor 87, or to input the signal from the Hall IC 41. Or a signal from the terminal 42 is input. Then, the control unit 88 drives or stops the drawer member driving device 1 based on these signals.

The control unit 88 includes a touch sensor 87
When a signal is received from the DC motor 4, power is supplied to the DC motor 4. Then, the first drive unit and the second drive unit start operating. However, since the driving speed of the rack member 2 as the first driving unit is high, the first drawer member 91 is primarily pushed out of the first storage space 83 by the driving force of the rack member 2 at first. Mainly due to the force of the rack member 2
After the push-out member 91 is pushed out, that is, after the push bar 22 is moved, the DC motor 4 is continuously driven.

At this time, the intermittent gear 9 rotates but is idle. On the other hand, the rotating roller 3 as the second driving unit is continuously driven, and the driving force of the rotating roller 3 causes the first pull-out member 91 to be sent forward slowly.
Then, the control unit 88 stops the DC motor 4 according to the stop detection signal sent from the Hall IC 42.
In this manner, the drawer member driving device 1 drives the first drawer member 91 under the control of the control unit 88.

The stop detection signal is generated periodically while the first drawer member 91 is moving, and when the first drawer member 91 is stopped, the stop detection signal is detected because the signal is interrupted or stopped when the first drawer member 91 is moving. The signals at that time can be compared and detected. Further, in addition to the stop detection, an end detection for detecting the completely drawn state or the completely pushed back state of the first drawer member 91 may be performed.

The first drawer member 91 configured as described above becomes considerably heavy when many articles are contained therein. For this reason, when the first drawer member 91 is configured to be driven from the open state to the closed state by the drawer member driving device 1, when a person tries to manually close the first drawer member 91, the finger is moved to the front part 91 a and the open port. It is dangerous to pinch it with 90. Therefore, the first drawer member 9
After the drawing operation of the drawing member 1 toward the front is completed and the DC motor 4 is slightly rotated in the reverse direction, the drawing member driving device 1 is turned off. That is, when the first drawer member 91 is pushed into the first storage space 83, a person manually returns the first drawer member 91. The drawer member driving device 1 may also operate during the return operation by taking measures such as detecting the load and stopping the movement of the motor.

Next, the operation of opening the first drawer member 91 of the refrigerator 81 using the drawer member drive device 1 of the first embodiment will be described below. In addition,
It is assumed that the first drawer member 91 is stored in the first storage space 83 and is held in the first storage space 83 by the attraction magnet 90a.

When a person touches the pull handle 91g at the lower end of the front portion 91a to open the first drawer member 91 in the freezer compartment of the refrigerator 81, the pull handle 91
The touch sensor 87 provided in g detects this contact and transmits a signal to the control unit 88. Then, the pull-out member driving device 1 is controlled by the control unit 88 via the lead wires 4a and 4b.
The command signal is input to the DC motor 4 that drives both the rack member 2 as the first drive unit and the rotating roller 3 as the second drive unit.

When a command signal is input to the DC motor 4,
The rotation shaft 4c of the DC motor 4 and the worm 7 rotate integrally. When the worm portion 7 rotates, this rotation is transmitted to the transmission gear 5 via the reduction gear body 8 and the transmission gear 5
Rotates in the direction of arrow C in FIG. The rotation of the transmission gear 5 is transmitted to both the intermittent gear 9 and the swing gear 10. At this time, the intermittent gear 9 rotates in the direction of arrow G. On the other hand, the swing gear 10 is swung toward the rotary roller 3 together with the swing disks 11a and 11b and the swing shaft 67 while rotating in the direction indicated by the arrow F '. In this state, the oscillating gear 10 is engaged with the pinion portion 3a of the rotating roller 3.

When the first pull-out member 91 is stored in the first storage space 83, the rack teeth 21a of the rack member 2 are in the rotation track of the intermittent feed teeth 9b of the intermittent gear 9. When the intermittent gear 9 rotates in the direction indicated by the arrow G, the rack member 2 engages with the intermittent gear 9 while the arrow A indicates.
Move in the direction. As a result, the push rod 22 also moves in the direction of arrow A integrally with the moving body 21,
Pushes out the front surface portion 91a of the first drawer member 91.

As described above, the first pull-out member 91 is connected to the rack member 2 as the first drive section of the pull-out member driving device 1.
Is pushed out of the refrigerator 81 against the position holding force of the attraction magnet 90a by the driving force of. Note that while the first pull-out member 91 is being pushed out by the rack member 2, the rotary roller 3, which is the other drive unit, also drives the first pull-out member 91 in cooperation with the rack member 2.

After the rack member 2 is moved in the direction of arrow A to push the first drawer member 91 slightly forward from the first storage space 83, the rack teeth 2
1a and the intermittent gear 9 are disengaged. Therefore, the intermittent gear 9 rotating by the driving force of the DC motor 4 idles. At this time, the position of the rack member 2 is held at the front position by fitting the fitting portion 21c into the elastic convex portion 71 provided on the casing 6.

On the other hand, the swing gear 10 rotates in the direction of arrow F 'while engaging with the pinion portion 3a of the rotating roller 3 by the rotation of the transmission gear 5 in the direction of arrow C. Thereby, the rotating roller 3 rotates in the direction of arrow E '. A feed dog 3d is provided on the outer periphery of the toothed roller portion 3b of the rotary roller 3, and the feed tooth 3d is a receiving tooth (not shown) provided on the upper surface of the side surface portion 91 of the first drawer member 91. Is engaged. As a result, the first drawer member 91 moves the refrigerator 8 by the driving force of the rotating roller 3.
1 slide forward.

As described above, the first drawer member 91 is
After being pushed forward of the refrigerator 81 against the holding force of the attraction magnet 90a by the driving force of the rack member 2 as a driving unit and the rotating roller 3 as a second driving unit, the rotating roller 3 of the second driving unit is rotated. With this driving force, the vehicle slides further forward.

When the first pull-out member 91 is pulled out to the end by the rotating roller 3, the Hall IC 42 as the end detecting means detects this. The Hall IC 42 transmits information that the first extraction member 91 has moved to the end to the control unit 88 via the circuit pattern 41d and the lead wire 42d. Thereby, the control unit 88
Stops the DC motor 4 and terminates the driving of the first drawer member 91 forward.

Further, after stopping the DC motor 4, the control unit 88 immediately rotates the DC motor 4 in the reverse direction. This D
The reverse rotation of the C motor 4 is performed by the worm portion 7 and the reduction gear body 8.
Through the transmission gear 5. Then, when the transmission gear 5 rotates in the reverse direction, that is, rotates in the direction indicated by the arrow D in FIG. Move to. Therefore, the oscillating gear 10 and the rotating roller 3
And the swing gear 10 is held at the position indicated by the dotted line by its own weight.

On the other hand, the rotation of the transmission gear 5 in the direction of arrow D is transmitted to the intermittent gear 9 simultaneously with the swing gear 10, and the intermittent gear 9 also rotates in the opposite direction, that is, clockwise in FIG. The rotation position of the intermittent gear 9 at the time of reverse rotation is detected by the Hall IC 41. And Hall I
C41 transmits the rotation position information of the intermittent gear 9 to the control unit 88 via the circuit pattern 41a and the lead wire 42a.

The control unit 88 determines, based on the rotational position information of the intermittent gear 9 sent from the Hall IC 41, a position where the intermittent feed tooth 9b does not enter the track of the rack tooth 21a, that is, the position of the intermittent gear 9 When it is at a position where it does not engage with the moving body 21, the DC motor 4 is stopped, and the reverse rotation drive of the intermittent gear 9 is stopped. As a result, the rack member 2
It is possible to return to the original position without engaging with the intermittent gear 9. After the first drawer member 91 is pulled forward by the pull 1 as described above, when returning to the original first storage space 83, a person manually performs the operation.

When the person manually returns the first drawer member 91 in the direction indicated by the arrow B in FIG. 1 due to the failure of the Hall ICs 41 and 42 or the control unit 88 or various other reasons, the swing gear 10 and the rotation gear 10 rotate. When the engagement with the roller 3 is not released, the rotation of the rotating roller 3 in the direction of arrow E is transmitted to the swing gear 10, and the swing gear 10 rotates in the direction of arrow F. Then, in response to the rotation of the swing gear 10, the transmission gear 5 rotates in the direction of arrow D. As a result, the swinging disk 11 receives the rotation of the transmission gear 5 in the direction indicated by the arrow D.
The a, 11b and the oscillating gear 10 are swung from a solid line position to a dotted line position in FIG. For this reason, the engagement between the oscillating gear 10 and the rotating roller 3 is released, and the rotating roller 3 idles, and the rotating force of the rotating roller 3 is not transmitted to the gear train mechanism. Thus, the rotating roller 3
In order to perform idle rotation, the first drawer member 91 is easily manually moved in the direction of arrow B.

When the oscillating gear 10 is disengaged from the rotating roller 3, the gravitational force keeps the state (the state where the oscillating gear 10 hangs downward as indicated by the dotted line in FIG. 1). Therefore, the rotary roller 3 can continue rotating in the idle direction in the direction indicated by the arrow E without engaging with the swing gear 10 thereafter. Further, when the DC motor 4 starts driving, it starts to move from this hanging state, so that the first movement starts from the first driving unit, and the second driving unit starts operation with a slight delay.

When the first pull-out member 91 is manually returned in the direction indicated by the arrow B, the transmission gear 5 is rotated in the direction indicated by the arrow D for a short time until the rotating roller 3 starts idling. I do. The rotation of the transmission gear 5 is
The power is transmitted to the reduction gear body 8. However, when the reduction gear body 8 receives this rotation, a large torque is applied to the reduction gear body 8 because the resistance on the DC motor 4 side is large. For this reason, the clutch spring 8c slips and the feed gear 8
b runs idle so that the tooth tips of the gears are not damaged.

On the other hand, the first drawer member 91 is completely
Immediately before being stored in the storage space 83, the front surface of the first drawer member 91 contacts the push rod 22 of the rack member 2. Then, the rack member 2 releases the position holding of the elastic convex portion 71 as the position holding portion, and further moves to the original position.

In the drawer driving apparatus 1 according to the first embodiment, the stroke of the push rod 22 is 2.
At 5 mm, the operation time is about 0.5 seconds. on the other hand,
The operation time of the rotating roller 3 is about 2.1 seconds, and the drawing length is about 40 cm. The torque of the push rod 22 is about 98 N (10.0 kgf), and the rotation torque of the rotating roller 3 is about 29 N (about 3 kgf). Note that these values can be set to other values as appropriate. Further, the clutch may not be provided without the clutch spring 8c, but in this case, each torque slightly increases.

The drawer member driving device 1 according to the first embodiment described above includes a rack member 2 as a first driving unit and a rotating roller 3 as a second driving unit,
Although the motor 4 is driven by rotation in one direction, a motor as a drive source is constituted by a motor capable of bidirectional rotation,
The rack member may be driven by one rotation of the motor, and the rotating roller may be driven by the other rotation. Hereinafter, an example of a drawer member driving device provided with a bidirectionally rotatable motor will be described as a second embodiment with reference to FIGS. Note that the refrigerator to which the drawer member drive device of the second embodiment is attached is the same as that of the first embodiment, so that the same reference numerals are used for the refrigerator.

The drawer member driving device 101 of the second embodiment is similar to the first embodiment in that the first drawer member 91 provided in the refrigerator 81 as a housing shown in FIG.
Is automatically drawn out to the front of the main body of the refrigerator 81.

As shown in FIG. 10, the drawer member driving device 101 connects the first drawer member 91 to the attracting magnet 9.
0a, a rack member 102 as a first drive unit that pushes out the front of the refrigerator 81 against the position holding force;
02 and the first drawer member 91 pushed out of the refrigerator 81
Rollers 103, 103 as a second drive unit that slides forward in the direction of the arrow, a bidirectionally rotatable drive motor 104 serving as a drive source for these two drive units, and a rack member 102 that drives the drive force of the drive motor 104. And a transmission unit 1 for transmitting to both the rotation rollers 103 and 103 and driving the rack member 102 and the rotation rollers 103 and 103.
05, a casing 106 for housing these inside,
have.

In the pull-out member driving device 101 according to the second embodiment, the drive motor 104 is controlled by a control unit (hereinafter, referred to as a control unit 88) similar to the control unit 88 according to the first embodiment. It is driven while controlling in both directions. Then, by rotating the drive motor 104 to one side, the rack member 102 is advanced and the first drawer member 91 is pushed forward. By rotating the drive motor 104 in the reverse direction, the rack member 102 is retracted to the original position, and the rotating rollers 103, 103 are further rotated to slide the first drawer member 91 further forward. Hereinafter, the configuration of each unit will be described in detail.

The drive motor 104 is installed and fixed to a motor fixing portion 161 provided inside the casing 106. The drive motor 104 is bidirectionally controlled and driven by a control unit 88 provided outside the casing 106.

The driving force of the driving motor 104 installed in this way is controlled by the worm 107 and the two reduction gears 10.
The transmission is reduced and transmitted to the transmission unit 105 via a gear train including the gears 8 and 109 and the input gear 110. By rotating the drive motor 104 to one side, the driving force of the drive motor 104 is transmitted from the transmission unit 105 to the first
The power is transmitted to the rack member 102 serving as a driving unit. Thus, the rack member 102 moves in the direction indicated by the arrow S in FIG.

By rotating the driving motor 104 to the other side, the driving force of the driving motor 104 is transmitted to the transmission unit 10.
5 to the rotating rollers 103, 103 via idlers 131, 132. Thus, the two rotating rollers 103 rotate in the direction indicated by the arrow J in FIG. The operation of the rack member 102 and the rotation rollers 103, 103 will be described later.

The rotation shaft 104c of the drive motor 104 projects from the insertion hole 161a provided in the motor fixing portion 161 into the internal space of the casing 106. This rotating shaft 1
The worm portion 107 is integrally fixed to the protruding portion of 04c. The worm portion 107 includes a worm shaft 107.
a and a worm gear 107b integrally formed on the outer periphery of the worm shaft 107a.

At one end of the worm shaft 107a, a fitting portion 107c for fitting and fixing the rotary shaft 104c of the drive motor 104 is provided. Also, the worm shaft 107a
Is rotatably supported by a worm support 163 formed on the casing 106. Further, the worm gear 107b is provided with a receiving gear 108a of the reduction gear portion 108.
Is engaged. With such a configuration, the worm unit 107 causes the driving force of the drive motor 104 to reduce the speed of the reduction gear unit 10.
The transmission is performed while reducing the speed to 8.

The reduction gear portion 108 includes a receiving gear 108a which engages with the worm gear 107b, and a reduction gear portion 1
09 is formed of a feed gear 108b that engages with the receiving tooth portion 109a. Receiving gear 108a and feed gear 10
8b is formed integrally with the rotating shaft 162
And is formed so as to be able to rotate integrally. The rotating shaft 162 includes two casing halves 106a,
106b respectively. When the receiving gear 108a receives the rotation of the worm 107,
This rotation is transmitted from the feed gear 108b to the reduction gear 109 while reducing the speed.

Further, the reduction gear unit 109 is provided with the reduction gear unit 1.
08 receiving tooth portion 109a which engages with the feed dog portion 108b
And a feed gear 109b engaged with the input gear 110. Receiving gear 109a and feed gear 109b
Are integrally formed coaxially, and the casing 1
06 is rotatably supported by a fixed shaft 164 provided upright. For this reason, the receiving gear 109a is
Is transmitted from the feed gear 109b to the input gear 110 while being reduced.

The input gear 110 has a receiving tooth portion 110a that engages with the feed gear 109b of the reduction gear portion 109, and a cylindrical shaft portion 110c extending from the center of one surface 110b of the receiving tooth portion 110a. , And a pinion portion 110d formed on the outer peripheral surface near the upper end of the shaft portion 110c. The input gear 110 configured as described above is connected to the transmission unit 1.
The first output gear 154 and the second output gear 155 of No. 05 are coaxially arranged, and are rotatably supported on the fixed shaft 165 together with these.

One surface 110b of the receiving tooth portion 110a is
The first output gear 154 arranged in the axial direction is in contact with one surface of the first output gear 154 in a freely operable state. Further, the shaft portion 110c is inserted through the center hole 154f of the first output gear 154, and protrudes into a circular recess 154g formed inside the first output gear 154. And this shaft part 110c
The case half 106a side is in contact with a shaft holder 155e that rotates integrally with the second output gear 155 in a freely operable state. Further, the pinion portion 110d
It is engaged with four planetary gears 153. With such a configuration, when the input gear 110 receives the driving force of the drive motor 104 from the reduction gear unit 109, it transmits this to the four planetary gears 153.

The transmission section 105 is engaged with the pinion section 110d of the input gear 110, which is one of the gear trains, and transmits the driving force of the driving motor 104 to the first output gear 154 and the second output gear 154.
Four planetary gears 153 as relay means for transmitting to the output gear 155, a first output gear 154 as first transmitting means for transmitting the driving force to the rack member 102 as a first driving unit, and a second driving unit Rotating roller 103 as
2nd output gear 1 as 2nd transmission means which transmits to 103
55. Thus, the transmission unit 105
The rack member 102 as a first driving unit and the rotating roller 1 as a second driving unit
03.

In the drawing member driving device 101 of the second embodiment, the driving motor 104 is rotated in one direction, and both the first output gear 154 and the second output gear 155 are indicated by arrows in FIG. The second output gear 155 does not rotate when the driving force that rotates in the K ′ direction is supplied.

That is, the idler 131 in which a one-way clutch is incorporated is engaged with the second output gear 155. An idler 132 having a clutch mechanism similar to the overload clutch of the reduction gear body 8 of the first embodiment is engaged with the idler 131, and two rotary rollers 103, 103 are connected to the idler 132. Have been. Therefore, when the input gear 110 starts to rotate in the direction of arrow N, the second output gear 155 tries to rotate in the direction of arrow K by rotating the planetary gear 153. The idler 131 cannot rotate, and as a result, the second output gear 155
Is fixed in that position. Therefore, the planetary gears 153 are rotated at that position by the input gears 110 in the counterclockwise direction in FIG. Therefore, a driving force in the direction indicated by the arrow K ′ (counterclockwise) is supplied to the first output gear 154. Here, the idler 131 is a first blocking unit that blocks the rotation of the second output gear 155.

The drawer driving device 101 rotates the driving motor 104 in the reverse direction to move the input gear 110 in FIG.
At the time of rotation in the direction of arrow N ', the first output gear 1
The reference numeral 54 is adapted to stop rotating after rotating in a direction K indicated by an arrow. That is, the rack member 102 is always engaged with the first output gear 154. When the rack member 102 is driven in the direction indicated by the arrow T and returned to the original position, the rack member 102 collides with a rotation preventing plate 158 serving as a second preventing portion, and is prevented from moving. Therefore, when the first output gear 154 rotates in the direction indicated by the arrow K even after returning the rack member 102 to the original position, the rotation is stopped by the rotation preventing plate 158.
Load. by this,
The load on the second output gear 155 described above is lighter than the load on the first output gear 154 by the rotation preventing plate 158, and only the second output gear 155 is driven preferentially.

With the above-described configuration, the pull-out member driving device 101 is configured to switch the one of the first output gear 154 and the second output gear 155 depending on the presence of the two blocking portions of the idler 131 having the one-way clutch and the rotation blocking plate 158. This is a device for selectively driving one of them.

As shown in FIGS. 10, 11 and 12,
The input gear 110, the first output gear 154, and the second output gear 155 are coaxially arranged so as to be free from each other and are rotatably supported on a fixed shaft 165 having both ends fixed to the casing 106. ing. The four planetary gears 153 are rotatably supported on fixed shafts 155a protruding from shaft holders 155e provided on the side surfaces of the second output gear 155, respectively.

[0120] A first arrangement located at an intermediate position in the axial direction
The output gear 154 has a circular recess 154g for radially disposing the four planetary gears 153. Also,
A center hole 154f for projecting the shaft portion 110c of the input gear 110 disposed below is provided at the center of the bottom surface 154e in the circular concave portion 154g. Further, four planetary gears 1 are provided on the inner wall of the circular recess 154g.
An internal gear 154a that engages with the gear 53 is provided.

Further, a part of the outermost peripheral portion of the first output gear 154 includes an outer peripheral gear 1 which engages with the rack teeth 121a of the rack member 102 as the first driving unit.
54b are formed. In addition, this outer peripheral gear 154b
Is formed in a range where the engagement with the rack teeth 121a does not always come off in the movement range of the rack member 102.

The first output gear 154 rotates when the rotation of the second output gear 155 is stopped by the idler 131 serving as a first blocking unit. With such a configuration, the first output gear 154 transmits the rotation of the drive motor 104 to the rack member 102 when the planetary gear 153 receives the driving force of the drive motor 104 and the rotation of the second output gear 155 is stopped. It is supposed to.

Further, the second output gear 155 disposed at the uppermost position in the axial direction is in free contact with the first output gear 154 disposed below. This second
On the surface of the output gear 155 on the side of the input gear 110, a shaft holder 155e having four fixed shafts 155a for rotatably supporting the four planetary gears 153 is provided. These fixed shafts 155a protrude into the circular recess 154g of the first output gear 154.

The second output gear 155 rotates when the rotation of the first output gear 154 is stopped by the rotation prevention plate 158 as a second prevention unit. That is,
When the movement is stopped by the rotation preventing plate 158 in a state where the rack member 102 is engaged with the first output gear 154, the rotation of the first output gear 154 is stopped. When a load is applied to the first output gear 154 in a state where the driving force is transmitted to the first output gear 154 in this manner, the planetary gear 153 turns to the first
It moves in the circumferential direction while engaging with the internal gear 154a of the output gear 154. As a result, the second output gear 155 causes the planetary gear 153 to move by the circumferential movement of the planetary gear 153.
And rotates integrally in the direction of arrow K '.

The outer peripheral portion of the second output gear 155 is provided with a feed dog portion 155b that engages with the idler 131 over the entire circumference. With such a configuration,
When the driving force of the driving motor 104 is transmitted and the second output gear 155 rotates, the second output gear 155 transmits this rotating force to the idler 131,
The light is transmitted to the rotating rollers 103 via the 132.

Further, each of the four planetary gears 153 is a fixed shaft 1 formed on one surface of the second output gear 155.
55a rotatably supported. These planetary gears 153 are arranged at intervals of about 90 ° so as to surround the pinion 110d of the input gear 110. Each planetary gear 153 is engaged with the pinion portion 110d, and is also engaged with the internal gear 154a of the first output gear 154. Thus, each planetary gear 153 transmits the driving force of the drive motor 104 input to the input gear 110 to the first output gear 154. When the first output gear 154 receives the load of the rotation preventing plate 158 as described above, each of the planetary gears 153
It moves in the direction of arrow K 'along 54a. At this time,
The second output gear 155 rotates with the movement of the planetary gear 153.

The rack member 102 as the first drive section
A moving body 121 that slides along a guide wall 170a formed on the case half 106a of the casing 106 and a guide wall 170b formed on the case half 106b;
The moving body 121 includes a push rod 122 having one end fixed to the moving body 121 and sliding with the moving body 121.

As shown in FIGS. 10 and 11, the moving body 121 has the rack teeth 121a engaged with the outer peripheral gear 154b of the first output gear 154 and the guide wall 170a slidably fitted inside. Guide groove 121b and guide wall 170b
Has a guide groove 121c that is slidably fitted inside.

When the first output gear 154 rotates in the direction indicated by the arrow K ′, the rotation is transmitted from the outer peripheral gear 154b to the rack teeth 121a, and the movable body 121 moves forward along the guide walls 170a, 170b. That is, it moves in the direction indicated by the arrow S in FIG. Further, when the moving body 121 rotates the drive motor 104 in the reverse direction and rotates the first output gear 154 in the arrow K direction, the guide wall 170
a, 170b, so as to retreat in the direction of arrow T. Then, when the moving body 121 reaches the origin position, it hits the rotation prevention plate 158 and stops moving.

[0130] As described above, the moving body 121 includes:
One end of the push rod 122 is fixed. Therefore, when the moving body 121 moves, the push bar 122 also moves integrally with the moving body 121. This push rod 1
Reference numeral 22 is formed of a rod-like member extending in the forward direction of the moving body 121, passes through an insertion hole 172 provided in the casing 106, and has the other end protruding outside the casing 106. The other end of the push rod 122 is disposed so as to contact the inside of the front surface portion 91a of the first drawer member 91 stored in the first storage space 83 of the refrigerator 81.

The push rod 122 is moved by the rotation of the moving body 121 in the direction indicated by arrow K ′ of the first output gear 154.
When it is moved in the direction of arrow S in FIG. 10, the other end further projects outward. As a result, the first drawer member 91 held in the first storage space 83 of the refrigerator 81 by the attraction force of the attraction magnet 90a is moved to the push rod 1
22 pushes forward against the holding force. Thereby, the first drawer member 91 is released from holding the position in the first storage space 83.

As described above, in the rack member 102 as the first drive unit, the push rod 122 is pushed forward of the refrigerator 81 by the rotational driving force of the drive motor 104,
An operation of releasing the first drawer member 91 from the position holding of the position holding means is performed. The rack member 102 is returned to the original position before the start of operation by rotating the drive motor 104 in the reverse direction. Note that the subsequent operation of the first drawer member 91, that is, the operation of sliding the first drawer member 91 forward of the refrigerator 81, is performed by the rotating rollers 103 serving as the second drive unit.

On the other hand, the idlers 131 and 132 are provided with a transmission section 105 and a rotating roller 103 as a second drive section.
103. And Idler 1
31 and 132 are for transmitting the driving force of the driving motor 104 to the rotating rollers 103 and 103 as a second driving unit.

The idler 131 is a ratchet gear. The idler 131 is provided upright on the casing 106 and has a plurality of arms 16.
The arm 166a of the fixed shaft 166 provided with 6a is rotatably fitted in only one direction (the direction of arrow L '). on the other hand,
The idler 132 transmits the rotation of the idler 131 to the two rotating rollers 103, 103. Since the idler 131 rotates only in the direction indicated by the arrow L ', it rotates only in the direction indicated by the arrow M in FIG. The idler 132 is rotatably supported on a fixed shaft 167 erected on the casing 106. With this configuration, the idler 131 connects the second output gear 155 with the arrow K ′.
When the idler 132 rotates in the direction indicated by the arrow L 'in response to the rotation in the direction indicated by the arrow, the idler 132 rotates in the direction indicated by the arrow M, and transmits this rotation to the two rotating rollers 103 and 103.

On the other hand, when the first drawer member 91 is manually driven in the closing direction (arrow T direction) and the rotating members 103, 103 serving as the second drive unit are rotated in the arrow J 'direction, the rotation is It is shut off by the idler 131. That is, the idler 131 cannot rotate in the arrow L direction. For this reason, the rotating rollers 103, 103
When the rotation is stopped, the first roller 91 slides relatively on the first drawer member 91. However, when the closing force is strong, the overload clutch incorporated in the idler 132 operates and the rotating rollers 103, 103 idle. Becomes With this configuration, even if the first drawer member 91 is closed with a strong force, this rotation is not transmitted to the transmission unit 105. Therefore, the rotational force is not transmitted to the drive motor 104. For this reason, it is possible to prevent the teeth of the gears such as the transmission unit 5 and the reduction gear units 108 and 109 from being damaged.

The drawer driving device 101
Is a device for driving the first drawer member 91 only to the front of the refrigerator 81. Therefore, after the first drawer member 91 is driven forward by the drawer member driving device 101 and a food or the like is taken in or out, a person manually returns the drawer member 91 into the first storage space 83. Therefore, when the first drawer member 91 is manually closed, the driving force is not transmitted to 105, and when the first drawer member 91 is closed with a strong force, the rotating rollers 103, 103 are closed.
This configuration in which the idle rotation is effective.

As shown in FIGS. 10 and 12, each of the two rotating rollers 103 as the second driving unit is
It comprises a pinion portion 103a that engages with the idler 132, and a rubber roller portion 103b that is integrally formed coaxially with the pinion portion 103a. The rotating rollers 103 are rotatably supported on fixed shafts 175 and 176, the ends of which are fitted and fixed to a casing 106, respectively. With this configuration, the idler 132
When the roller rotates in the direction of arrow M, the rotating rollers 103, 10
3 rotate in the direction of arrow J in response to the rotation of the idler 132.

The rubber rollers 103b, 103b
Are groove portions 173 provided in the casing 106, respectively.
And a part of the outer periphery thereof is arranged to protrude outside the casing 106. And the rubber roller unit 10
The projecting portions of 3b and 103b are configured to be pressed against the upper surface of the side surface portion 91c of the first drawer member 91. Therefore, when the rotating rollers 103, 103 rotate in the direction indicated by the arrow J, the first drawer member 91 is slid to the front of the main body of the refrigerator 81 by frictional force.

The rubber rollers 103b, 10b
The frictional force between 3b and the upper surface of the side surface portion 91c of the first drawer member 91 is not so strong. Therefore, the driving force of the rotation rollers 103 and 103 for driving the first pull-out member 91 is weak, and the driving force is small for the rack member 1.
02 is smaller than the force and speed of pushing out the first drawer member 91. With such a configuration, in the drawer member driving device 101, the attracting magnet 90a
After the first pull-out member 91 held in the first storage space 83 by the position holding means constituted by the above is pushed forward by the rack member 102 having a large driving force to release the position holding, the rotation of the small driving force is released. The rollers 103 and 103 are slid slowly.

In the second embodiment, the first drawer member 91 is sent to the front of the main body of the refrigerator 81 by the frictional force of the rubber rollers 103b, 103b. A feed dog may be provided as in the embodiment described above, and the first drawer member 91 may be fed by the feed dog. In any of the methods, the driving force of the rotating rollers 103, 103 serving as the second driving unit,
That is, it is preferable that the driving force for sending the first drawer member 91 forward by the rotation of the rotating rollers 103 is weaker than the driving force of the rack member 102 serving as the first driving unit.

Further, the drawer driving device 101
Is a device that drives the first drawer member 91 only to the front of the refrigerator 81 body, as in the first embodiment, as described above. Therefore, the drawer member driving device 101 is rotated by the rotating rollers 103 and 103 to the first position.
After the drawer member 91 is completely driven forward, a person manually removes the first drawer member 91 from the first storage space 8.
3 inside. When the first drawer member 91 is manually returned to the first storage space 83 side, the first drawer member 91 is rotated by the rotating rollers 103 and 10.
3 while rotating and sometimes stopping
It returns to the storage space 83.

Even if the rotating rollers 103, 103 rotate in the direction of the arrow J 'under the strong rotation of the first pull-out member 91, the rotating rollers 10
The rotation of the rotation shaft 103 is not transmitted to the mechanical mechanism arranged inside the casing 106 because the rotations 3 and 103 are idle. Therefore, even when a person manually returns the first drawer member 91 in the arrow T direction, it can be easily moved.

As described above, the casing 106 is composed of the two case halves 106a and 106b, and includes the rack member 102 as the first driving unit, the rotating rollers 103 and 103 as the second driving unit, and the driving source. And a box-shaped housing in which a drive motor 104 and the like are housed.

[0144] The drawer member driving device 101 of the second embodiment configured as described above, similarly to the first embodiment, drives the first drawer member 91 of the refrigerator 81 so as to drive the refrigerator 81. It is attached. The drawer member driving device 101 is configured to partition the refrigerator 81 by inserting screws (not shown) into fixing screw holes 101b, 101b provided in fixing portions 101a, 101a provided in the outer frame of the casing 106. 85 is detachably screwed and fixed. In addition, refrigerator 8
The configuration of No. 1 has already been described, and thus is omitted.

Next, an operation of opening the first drawer member 91 of the refrigerator 81 using the drawer member driving device 101 of the second embodiment will be described below. It is assumed that the first drawer member 91 is stored in the first storage space 83 and is held in the first storage space 83 by the attraction magnet 90a.

When a person touches the pull handle 91g at the lower end of the front portion 91a to open the first drawer member 91 in the freezer compartment of the refrigerator 81, the pull handle 91 is pulled.
The touch sensor 87 provided in g detects this contact and transmits a signal to the control unit 88. Then, the rack member 102 as the first drive unit and the rotating roller 10 as the second drive unit of the pull-out member drive device 1 are sent from the control unit 88.
A command signal is input to a drive motor 104 that drives both the third and the third.

When a command signal is input to the drive motor 104, the drive motor 104 first rotates in one direction by a predetermined number of revolutions. Then, the rotating shaft 104c and the worm 107
And rotate together. When the worm 107 rotates, the rotation is transmitted to the input gear 110 via the reduction gear bodies 108 and 109.

When the driving force in one direction of the driving motor 104 is transmitted as described above, the input gear 110 rotates in the direction of arrow N in FIG. This rotation is based on the input gear 1
Ten planetary gears 153 of the transmission part 105 arranged so as to surround the input gear 110 from the ten pinion parts 110d.
To each of them. Thereby, four planetary gears 15
3 is an internal gear 154a of the first output gear 154, respectively.
, The second output gear 155 tries to rotate in the direction of the arrow K due to the force.

However, the rotation of the second output gear 155 in the direction indicated by the arrow K is blocked by the idler 131 and the second output gear 1
55 cannot rotate. That is, the second output gear 155
Is stopped from rotating by an idler 131 as a first blocking unit, and is in a stopped state. For this reason, the first output gear 154 rotates in the direction indicated by arrow K ′ as each planetary gear 153 rotates in the direction indicated by arrow P at that position.

When the first output gear 154 rotates in the direction indicated by arrow K 'in this manner, the rack teeth 121a of the rack member 102 are sent to the feed teeth 154b, and the moving body 121
Moves together with the push rod 122 in the arrow S direction. As a result, the front end portion of the push rod 122 pushes out the front surface portion 91 a of the first drawer member 91.

As described above, the first drawer member 91 is pushed forward of the refrigerator 81 against the holding force of the attraction magnet 90a by the driving force of the rack member 102 as the first drive unit of the drawer member driving device 101. .

After the rack member 102 is moved in the direction indicated by the arrow H and the first drawer member 91 is slightly pushed forward from the first storage space 83, the control section 8 moves.
Under the control of 8, the drive motor 104 is rotated in the reverse direction. Then, the reverse rotation is transmitted to the input gear 110 via the worm 107 and the two reduction gear bodies 108 and 109.

When the driving force of the driving motor 104 is transmitted in the reverse direction, the input gear 110 rotates in the direction of arrow N 'in FIG. Thus, the four planetary gears 153 of the transmission unit 105 rotate in the directions indicated by arrows P ′. At this time, the rotation of the second output gear 155 that rotatably supports the planetary gears 153 is transmitted to the idler 131, and the idler 131 is indicated by an arrow L '.
Try to rotate in the direction. However, when the load when the second output gear 155 is driven and the load that the first output gear 154 receives from the rack member 102 are compared, the former load is large and the second output gear 155 is stopped.
For this reason, each planetary gear 153 rotates in the direction indicated by the arrow P ′ at that position, whereby the first output gear 154 becomes
Rotate in the direction.

When the first output gear 154 rotates in the direction indicated by arrow K in this manner, the rack member 1 is attached to the feed dog 154b.
The rack member 121a of No. 02 is sent, and the moving body 121 moves backward together with the push rod 122 in the arrow T direction. As a result, the rack member 102 is returned to the original position before the movement, and hits the rotation preventing plate 158. From this state, the drive motor 104 continues to rotate in the reverse direction.

Then, the first output gear 154 which is in free contact with each planetary gear 153 is rotated by the rotation preventing plate 158.
Will be loaded. That is, the first output gear 1
The rotation of the motor 54 is stopped by the rotation prevention plate 158 as a second prevention unit and stopped. At this time, the second output gear 15
As described above, the load that the first output gear 154 receives from the idler 131 is lighter than the load that the first output gear 154 receives on the rotation prevention plate 158. Therefore, each planetary gear 153 revolves with respect to the input gear 110 while engaging with the internal gear 154a of the first output gear 154. As a result, the second output gear 155 rotates in the direction indicated by arrow K '.

As described above, when the second output gear 155 rotates in the direction indicated by arrow K ', this rotation causes the idler 13 to rotate.
1 rotates in the direction of arrow L '. As a result, the idler 132 rotates in the direction indicated by the arrow M, and transmits this rotational force to the two rotating rollers 103. As a result, the two rotating rollers 103, 103 rotate in the directions indicated by the arrows J while being pressed against the upper surface of the side surface portion 91c of the first drawer member 91. Then, the first drawer member 91 slides forward of the refrigerator 81 by the driving force of the rotating rollers 103, 103.

As described above, the first pull-out member 91 is
After being pushed out of the refrigerator 81 against the holding force of the attraction magnet 90a by the driving force of the rack member 102 as a driving unit, the sliding unit is further slid forward by the driving force of the second driving units 103 and 103. Becomes
When the first drawer member 91 is returned to the original first storage space 83, a manual operation is performed by a person.

Each of the above embodiments is an example of a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention. is there. For example, in each embodiment, the drawer member driving devices 1 and 101 are attached to the refrigerator 81. However, the present invention is not particularly limited to this, and other housings, for example, a sliding drawer member such as a chest of drawers or a desk. May be attached.

In the refrigerator 81, the drawer member driving devices 1 and 101 are attached to only one side surface 91c of the first drawer member 91.
c, 91c to cooperate.
Furthermore, the drawer member driving devices 1 and 101
1c, not the upper partition 85, but the first storage space 8
Opening 9 of both or one of side surfaces 83c, 83c
It may be provided near zero. In this case, the pull-out member driving devices 1 and 101 push out portions near the side ends of the front surface portion 91a of the first draw-out member 91 with the push rods 22 and 122, and use the rotating rollers 3, 103 and 103 to move the side portions of the side portion 91c. The part will be sent out.

In the refrigerator 81, the pull handle 9
Instead of 1 g, a protruding pull handle 99 as shown in FIG. 13 may be provided. A touch sensor 99a that a human hand touches when pulling out is provided on the back surface of the pulling handle 99. Here, the touch sensor 99a plays a role of the touch sensor 87 described above.

Furthermore, in the drawer member driving device 1 of the first embodiment, the motor drive source is rotated only in one direction and only the opening operation of the drawer member 91 is automated. A simple motor may be used to automate both the opening and closing operations.

Further, the drawer member driving device 101 of the second embodiment does not particularly have a structure in which sensors are provided to recognize the moving position of the drawer member 91.
Similarly to the first embodiment, a sensor for detecting the end of the drawer member is attached to detect the movement position, or the rotation position of the input gear 110 is detected and the drive motor 104 is detected based on the position information. Control may be performed. Furthermore, in the drawer member driving device 101 according to the second embodiment, the position holding means for holding the position of the rack member 102 when the rack member 102 moves forward is not provided. Position holding means for holding the position of the rack member 102 at the front position may be provided as in the embodiment.

[0163]

As described above, according to the drawer member driving device of the first aspect, a driving force is supplied from one driving source to two different driving units via the transmission unit. 2
One of the driving units is a first driving unit for pushing the drawer member forward of the housing against the holding force of the position holding means, and the other is a sliding movement of the drawer member forward of the housing. And a second drive unit. Thus, 2
The drawer member can be pulled out to the front of the housing by the drive units having different functions. Therefore, the drawer member stored in the housing can be easily pulled out to the front side, and both the operation of pushing out from the storage space and the operation of sliding forward can be smoothly performed.

According to the second aspect of the present invention, the first
If the driving force of the driving unit is configured to be larger than the driving force of the second driving unit, even if the drawer member is strongly held in the storage space, the position holding is easily released, and the sliding movement is performed thereafter. The operation can be slow and at a safe speed.

Further, according to the third aspect of the present invention, the first drive section is constituted by a rack member for pushing out the drawer member by advancing forward while contacting the drawer member. Therefore, the drawer member can be reliably pushed out with a strong force. Further, the second drive unit is configured by a rotating roller that feeds out the drawer member by rotating while sliding on the drawer member. Therefore, by adjusting the frictional force between the rotating roller and the drawer member, it is possible to adjust the strength and speed of the driving force for sending the drawer member forward.

According to the fourth aspect of the present invention, the first
Since the position holding portion for holding the position of the first driving portion at the front position when the driving portion advances forward is provided, the drawer member driving device of the first driving portion vibrates due to the vibration of the housing. In such a case, the operation can be reliably performed without being affected by the vibration.

Further, according to the fifth aspect of the present invention, there is provided a control unit for turning off the drive source after the drawer member has moved to the end. Therefore, the drawer member driving device, after reliably driving the drawer member to the end,
Since the power is turned off without exerting a useless driving force, power consumption can be reduced.

According to the present invention, an intermittent gear for intermittently engaging the transmission portion and the first driving portion is provided, and the transmission portion is swingably engaged with the second driving portion. An oscillating gear is provided. Therefore, during normal driving, the driving force of the driving source is reliably transmitted to both driving units. In addition, when the drawer member is manually returned to the closing direction, the force is not transmitted to the inside of the mechanical mechanism, so that a highly reliable and safe drawer member in which damage to the gears and the like are prevented. It can be a driving device.

According to the seventh aspect of the present invention, the driving source is constituted by a bidirectionally rotatable motor, and the first driving unit is driven forward by using one of the motors to rotate. After the first drive unit is retracted to the original position by using the reverse rotation, the second drive unit is driven. For this reason, even if the drawer member is manually returned with a strong force, the first drive unit is retracted to the original position, so that the contact portion with the drawer member and other parts are not damaged, and the reliability is improved. And a drawer member drive device with high safety can be obtained.

According to the eighth aspect of the present invention, when the motor is rotated to one side, the first blocking portion is provided to prevent the rotation from being transmitted to the second drive portion, and the motor is rotated in the reverse direction. A second blocking unit is provided to prevent the rotation from being transmitted to the first driving unit when the rotation is performed. Therefore, the driving force of the motor is alternatively transmitted to one of the driving units, and a highly reliable drawer member driving device in which each driving unit operates reliably can be provided.

According to the ninth aspect of the present invention, the first transmitting means for transmitting the transmitting portion to the first driving portion, and the second transmitting portion for transmitting the transmitting portion to the first driving portion.
A second transmission unit for transmitting the driving force to the driving unit, and a relay unit for transmitting the driving force to both the first and second transmission units; the first transmission unit stops the second transmission unit; It is configured to stop the first transmission means in the section. Therefore, the driving force of the motor can be more reliably and selectively supplied to each driving unit by using the transmission unit, and a highly reliable drawer member driving device that operates each driving unit can be provided.

Further, according to the tenth aspect of the present invention,
The planetary gears are configured to revolve by engaging the relay means with one of the gear trains and revolve when the first transmission means is stopped, so that the operation is highly reliable. A drawer member driving device can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating an internal structure of a drawer member driving device according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional development view of the drawer member driving device shown in FIG. 1, mainly showing a path from a DC motor to a rack member.

FIG. 3 is a longitudinal sectional development view of the drawer member driving device shown in FIG. 1, mainly showing a path from a DC motor to a rotating roller.

FIG. 4 is a perspective view showing an intermittent gear of the drawer member driving device shown in FIG.

FIG. 5 is an enlarged view showing a rack tooth portion of the moving body of the drawer member driving device shown in FIG.

FIG. 6 is a view of FIG. 1 as viewed from a direction indicated by an arrow VI.

FIG. 7 is a longitudinal sectional view showing the entire refrigerator to which the drawer member driving device according to the first embodiment is attached.

FIG. 8 is a perspective view showing the entire refrigerator of FIG. 7;

9 is a block diagram showing a drive control system related to a drawer member drive device in the refrigerator shown in FIG.

FIG. 10 is a plan view illustrating an internal structure of a drawer member driving device according to a second embodiment of the present invention.

FIG. 11 is a vertical cross-sectional development view of the drawer member driving device shown in FIG. 10, mainly showing a path from a driving motor to a rack member.

FIG. 12 is a longitudinal sectional development view of the drawer member driving device shown in FIG. 10, which is a diagram mainly showing a path from a driving motor to a rotating roller.

FIG. 13 is a perspective view showing the entire refrigerator as a modification of the first and second embodiments of the present invention.

FIG. 14 is a perspective view showing a refrigerator as a housing having a conventional slide-type drawer.

15 is a partial cross-sectional view showing a main part of the refrigerator shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 drawer member drive device 2 rack member (first drive unit) 3 rotating roller (second drive unit) 4 DC motor (drive source) 5 transmission gear (transmission unit) 9 intermittent gear 10 swing gear 71 elastic projection (position) Holding section) 81 Refrigerator (housing) 83 First storage space 88 Control section 91 First drawer member 101 Pullout member drive device 102 Rack member (first drive section) 103 Rotary roller (second drive section) 104 Drive motor (drive) Source) 105 Transmission unit 108, 109 Reduction gear unit (part of gear train) 110 Input gear (part of gear train) 131 Idler (first blocking unit) 153 Planetary gear (relay means) 154 First output gear (1st transmission means) 155 2nd output gear (2nd transmission means) 158 Rotation prevention plate (2nd prevention part)

Claims (10)

[Claims] 1. A drawer member driving device for pulling out a drawer member for storage housed while being held in a storage space of a housing toward the front of the housing, wherein the drawer member is held in position. A first drive unit that pushes the drawer member forward of the housing from the storage space against the force, a second drive unit that slides the drawer member forward of the housing, the first drive unit, and the second drive unit. One driving source for supplying a driving force to the driving unit, and transmitting the driving force of the driving source to both the first driving unit and the second driving unit to drive the first driving unit and the second driving unit A pull-out member driving device, comprising: 2. The drawer member driving device according to claim 1, wherein the driving force of the first driving unit and the driving force of the second driving unit are set to different amounts. 3. The first drive section is advanced and retracted in the same direction as the direction in which the drawer member slides, and is pushed out by advancing while abutting on a predetermined portion of the drawer member. 3. The device according to claim 1, wherein the second drive unit is configured by a rotating roller that sends out the drawer member by rotating while slidingly contacting a part of the drawer member. 4. Drawer drive. 4. When the rack member advances forward,
4. The drawer member driving device according to claim 3, further comprising a position holding portion for holding the position of the rack member at a front position. 5. The drawer member driving device according to claim 1, further comprising a control unit for turning off the drive source after the drawer member has moved to the end. 6. Between the transmission unit and the first drive unit,
An intermittent gear provided so as to always engage with the transmission unit and intermittently engage with the first drive unit is provided, and the transmission unit and the second drive unit are always interposed between the transmission unit and the second drive unit. 6. The drawer member drive device according to claim 1, further comprising a swing gear that engages and swingably engages with the second drive unit. 7. The driving source is constituted by a bidirectionally rotatable motor, and by rotating the motor to one side, the first driving unit is advanced to push out the drawer member to the front of the housing. Reversing the motor to move the first drive unit back to the original position, and then rotating the second drive unit to slide the drawer member forward of the housing. Item 6. A drawer member driving device according to Item 1, 2, 3, 4, or 5. 8. A first blocking portion for preventing the driving force of the motor from being transmitted from the transmission portion to the second driving portion when the motor is rotated to one side, and a first blocking portion for rotating the motor in a reverse direction. 8. The drawer member driving device according to claim 7, further comprising a second blocking portion for preventing the driving force from being transmitted from the transmission portion to the first driving portion. 9. A driving device, comprising: a first transmission unit that transmits the driving force of the driving source to the first driving unit; a second transmission unit that transmits the driving force to the second driving unit; And relay means for transmitting the driving force to both the first transmission means and the second transmission means, wherein the first blocking part is for stopping the second transmission means, and
9. The drawer member driving device according to claim 8, wherein the blocking portion is for stopping the first transmission unit. 10. The relay means rotates by engaging with one of gear trains provided between the drive source and the transmission unit, and transmits the rotational force to the first transmission means. When the first transmission means is stopped, the second
The drawer member drive device according to claim 9, wherein the drive member is configured by a planetary gear that revolves with respect to one of the gear trains together with the transmission means.